Since 2004, the UNESCO Archives and Records Management Unit crawled the UNESCO portal and archived approximately three snapshots of the UNESCO Internet and Intranet per year with some snapshots of field office websites as well. From 2010 onwards, the regularly scheduled snapshots have ceased and captures are now done on request of the unit or office. The snapshots contain the html-contents of the portal while all other file formats, such as .pdf, .doc, etc. are excluded from the crawls. The structure is then reconstructed by sector or office. The collection is arranged in two main series: Intranet pages and Internet pages.